Which central venous pressure finding indicates fluid volume deficit?

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Study for the NMNC 4335 IV Skills Test. Explore flashcards and multiple choice questions, each with hints and explanations. Prepare for your exam today!

Multiple Choice

Which central venous pressure finding indicates fluid volume deficit?

Explanation:
Central venous pressure reflects the filling pressure of the right heart and overall intravascular volume. When there is fluid volume deficit, less blood returns to the heart, reducing the right atrial filling pressure, so CVP falls. This low CVP indicates reduced preload from hypovolemia. By contrast, higher CVP points to fluid overload or impaired venous return (as in right-heart failure or certain obstructive conditions). A normal CVP can occur with euvolemia or compensatory changes, and unchanged venous pressure wouldn’t typically match volume loss.

Central venous pressure reflects the filling pressure of the right heart and overall intravascular volume. When there is fluid volume deficit, less blood returns to the heart, reducing the right atrial filling pressure, so CVP falls. This low CVP indicates reduced preload from hypovolemia. By contrast, higher CVP points to fluid overload or impaired venous return (as in right-heart failure or certain obstructive conditions). A normal CVP can occur with euvolemia or compensatory changes, and unchanged venous pressure wouldn’t typically match volume loss.

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